J_2024 05 09_West Orange Stormwater Management Plan

Post-Developed (O-1B) NOAA 24-hr D 2-Year_Current Rainfall=3.45", P2=3.45" West Orange HydroCAD_Post Printed 5/13/2024 Page 85 Prepared by Burns & McDonnell HydroCAD® 10.20-4b s/n 08510 © 2023 HydroCAD Software Solutions LLC Summary for Pond 19P: SD-21 Inflow Area = 0.567 ac, 17.46% Impervious, Inflow Depth > 2.11" for 2-Year_Current event Inflow = 0.24 cfs @ 12.86 hrs, Volume= 0.099 af Outflow = 0.24 cfs @ 12.86 hrs, Volume= 0.099 af, Atten= 0%, Lag= 0.1 min Primary = 0.24 cfs @ 12.86 hrs, Volume= 0.099 af Routed to Pond 18P : SD-22 Routing by Dyn-Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.0100 hrs Peak Elev= 590.85' @ 12.86 hrs Surf.Area= 0.000 ac Storage= 0.000 af Plug-Flow detention time= 0.1 min calculated for 0.099 af (100% of inflow) Center-of-Mass det. time= 0.0 min ( 888.7 - 888.6 ) Volume #1 Device #1 Invert 590.61' Avail.Storage 0.001 af Routing Primary Invert 590.61' Storage Description 12.0" Round SD-21 L= 64.5' S= 0.0150 '/' Outlet Devices 12.0" Vert. SD-21 C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=0.24 cfs @ 12.86 hrs HW=590.85' TW=588.77' (Dynamic Tailwater) 1=SD-21 (Orifice Controls 0.24 cfs @ 1.66 fps) Pond 19P: SD-21 Hydrograph 0.26 Inflow Primary 0.24 cfs Inflow Area=0.567 ac Peak Elev=590.85' Storage=0.000 af 0.24 cfs 0.24 0.22 0.2 Flow (cfs) 0.18 0.16 0.14 0.12 0.1 0.08 0.06 0.04 0.02 0 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 Time (hours) 15 16 17 18 19 20 21 22 23 24